Process for recovering the material of the support of kinematographic films and waste portions of the same.



STAES Parana FFEQEG HENRY DANZEE, OF PARIS, FRANCE.

PROCESS FOR BEGOVERING THE MATERIAL OF THE SUPPORT OF KINEMATOGRAPHIC FILMS AND WASTE PORTIONS OF THE SAME.

No Drawing.

1 0 all whom it may concern:

Be it known that I, HENRY DANZER, a citizen of the French Republic, residing at Paris, in the Department of the Seine, France, have invented certain new and use ful Improvements in Processes for Recoyering the Material of the Support of K ne matographic Films and \Vaste' Portions of the Same, of which the following is a specification. v

This invention refers to a process for recovering; the material of, the support of kinematographic' films.

It consists in depriving used, unsold or other films of their gelatin for the purpose of recovering, 1, the metallic silver of the pictures; 2, the material formin the support without occasioning any al eration of the said material. F or this 'purposeprepa rations containing soluble proteolytic fer .ments (-pepsip, trypsm, papain or the like) or living ferments (liquefying bacteria and the like) are used.

When using soluble ferments, the preparations will be obtained either by the direct solution of the ferments or by macerating vegetal or animal parts, either by macerating several difierent 'parts some of which may contain strengthening diastases.

The materials to be treated will be submitted to the action of the liquids obtained during the time necessary for hydrating,

digesting or liquefyin'g the gelatin: this time i will vary according to the products employed, the concentration of the liquids and the temperature. r

For the sake oi example, the films to be treated, comprising the celluloid bands or Specification of Letters Patent.

Patented June 17, 1913,

Application filed July 6, 1909. Serial No. 506,105.

supports coated with the insoluble gelatinobromid emulsion, are plunged into a diluted solution of commercial trypsin, heated to a temperature of about forty degrees Celsius; in this case, the solution will be efiefcted Very rapidly, owing to the fact that the trypsin converts the gelatin into peptones which are 1. A process for removing the gelatinccating from the support of a developed kinematographic film, which consists in jecting said film to the action of a solutidii to convert said insoluble gelatin coating into a soluble peptone, and then washing said support.

2. .The process of removing the gelatin coating from the support of a developed kinematographic film, which consists inplacing said film in a dilute solution of trypsin heated to about forty degrees Celsius, and thentval shing said support, v

In testimoipr whereof I affix mysignature in presence gtwo witnesses.

' HENRY DANZER.

- Witnesses: I I

Giirrns DANZER, ,Muriss Gnnsrm.

readily dissolved in cool or tepid water.

6O containing a proteolvtic. ferment, 1n order- 

